Boys & Baby Boys New Arrivals Koop

New arrivals

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Shop Women Shop Men
Explore the latest arrivals in second-hand clothing for boys. Shop our collection of preloved new arrivals, including jeans, tops, bottoms, and more. Update your little one's wardrobe with sustainable fashion choices.
93 products
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UNBRANDED Regular fit Button-down Top in Green - XL Koop
UNBRANDED Regular fit Button-down Top in Green - XL Koop
UNBRANDED Regular fit Button-down Top in Green - XL
$24.00 $9.00 Save 63%
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GAP Regular fit Pant Shorts in Gray - L Koop
GAP Regular fit Pant Shorts in Gray - L Koop
GAP Regular fit Pant Shorts in Gray - L
$69.00 $15.00 Save 78%
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THE CHILDREN'S PLACE Regular fit Straight-legged Jean in Blue - 10 Koop
THE CHILDREN'S PLACE Regular fit Straight-legged Jean in Blue - 10 Koop
THE CHILDREN'S PLACE Regular fit Straight-legged Jean in Blue - 10
$35.00 $11.00 Save 69%
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LACOSTE Regular fit T-shirt in Orange - 36 Koop
LACOSTE Regular fit T-shirt in Orange - 36 Koop
LACOSTE Regular fit T-shirt in Orange - 36
$88.00 $21.00 Save 76%
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UNBRANDED Toys in Yellow - S Koop
UNBRANDED Toys in Yellow - S Koop
UNBRANDED Toys in Yellow - S
$15.00 $6.00 Save 60%
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UNBRANDED Toys in Brown - S Koop
UNBRANDED Toys in Brown - S Koop
UNBRANDED Toys in Brown - S
$15.00 $6.00 Save 60%
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UNBRANDED Toys in Brown - S Koop
UNBRANDED Toys in Brown - S Koop
UNBRANDED Toys in Brown - S
$15.00 $6.00 Save 60%
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CARAVAN SOFT TOYS Toys in Brown - S Koop
CARAVAN SOFT TOYS Toys in Brown - S Koop
CARAVAN SOFT TOYS Toys in Brown - S
$15.00 $6.00 Save 60%
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GYMBOREE Regular fit Vest in Blue - L Koop
GYMBOREE Regular fit Vest in Blue - L Koop
GYMBOREE Regular fit Vest in Blue - L
$49.00 $14.00 Save 71%
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JOE FRESH Regular fit Pant Shorts in White - 4 11.29 Koop
JOE FRESH Regular fit Pant Shorts in White - 4 11.29 Koop
JOE FRESH Regular fit Pant Shorts in White - 4
$39.00 $11.00 Save 72%
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CARTER'S Regular fit Pajamas in Gray - 9M 5.99 Koop
CARTER'S Regular fit Pajamas in Gray - 9M 5.99 Koop
CARTER'S Regular fit Pajamas in Gray - 9M
$18.00 $8.00 Save 56%
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WONDER NATION Regular fit Button-down Top in Gray - XS 9.59 Koop
WONDER NATION Regular fit Button-down Top in Gray - XS 9.59 Koop
WONDER NATION Regular fit Button-down Top in Gray - XS
$25.00 $10.00 Save 60%
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UNBRANDED Regular fit T-shirt in Green - 4T 7.89 Koop
UNBRANDED Regular fit T-shirt in Green - 4T 7.89 Koop
UNBRANDED Regular fit T-shirt in Green - 4T
$19.00 $8.00 Save 58%
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OLD NAVY Regular fit Pant in Gray - XS 13.99 Koop
OLD NAVY Regular fit Pant in Gray - XS 13.99 Koop
OLD NAVY Regular fit Pant in Gray - XS
$44.00 $14.00 Save 68%
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CAT & JACK Regular fit Pant Shorts in Blue - 5T 5.25 Koop
CAT & JACK Regular fit Pant Shorts in Blue - 5T 5.25 Koop
CAT & JACK Regular fit Pant Shorts in Blue - 5T
$15.00 $6.00 Save 60%
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THE CHILDREN'S PLACE Regular fit Jean Shorts in Orange - 5 11.19 Koop
THE CHILDREN'S PLACE Regular fit Jean Shorts in Orange - 5 11.19 Koop
THE CHILDREN'S PLACE Regular fit Jean Shorts in Orange - 5
$35.00 $11.00 Save 69%
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NIKE Regular fit Pant Shorts in Blue - S 11.99 Koop
NIKE Regular fit Pant Shorts in Blue - S 11.99 Koop
NIKE Regular fit Pant Shorts in Blue - S
$48.00 $12.00 Save 75%
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GYMBOREE Regular fit T-shirt in White - XS 11.99 Koop
GYMBOREE Regular fit T-shirt in White - XS 11.99 Koop
GYMBOREE Regular fit T-shirt in White - XS
$44.00 $12.00 Save 73%
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OSHKOSH Regular fit Button-down Top in Orange - 5T 7.99 Koop
OSHKOSH Regular fit Button-down Top in Orange - 5T 7.99 Koop
OSHKOSH Regular fit Button-down Top in Orange - 5T
$22.00 $8.00 Save 64%
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GYMBOREE Regular fit T-shirt in Green - 4T 11.99 Koop
GYMBOREE Regular fit T-shirt in Green - 4T 11.99 Koop
GYMBOREE Regular fit T-shirt in Green - 4T
$44.00 $12.00 Save 73%
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JUMPING BEANS Regular fit T-shirt in Gray - M 7.99 Koop
JUMPING BEANS Regular fit T-shirt in Gray - M 7.99 Koop
JUMPING BEANS Regular fit T-shirt in Gray - M
$12.00 $8.00 Save 33%
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CAT & JACK Regular fit Button-down Top in Blue - 5T 5.25 Koop
CAT & JACK Regular fit Button-down Top in Blue - 5T 5.25 Koop
CAT & JACK Regular fit Button-down Top in Blue - 5T
$15.00 $6.00 Save 60%
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UNBRANDED Overalls in White - S 11.29 Koop
UNBRANDED Overalls in White - S 11.29 Koop
UNBRANDED Overalls in White - S
$39.00 $12.00 Save 69%
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UNBRANDED Overalls in Gray - S 11.29 Koop
UNBRANDED Overalls in Gray - S 11.29 Koop
UNBRANDED Overalls in Gray - S
$39.00 $12.00 Save 69%
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UNBRANDED Overalls in White - S 11.29 Koop
UNBRANDED Overalls in White - S 11.29 Koop
UNBRANDED Overalls in White - S
$39.00 $12.00 Save 69%
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GEORGE Regular fit Button-down Top in Blue - 4 13.25 Koop
GEORGE Regular fit Button-down Top in Blue - 4 13.25 Koop
GEORGE Regular fit Button-down Top in Blue - 4
$44.00 $10.00 Save 77%
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ABERCROMBIE & FITCH Regular fit Button-down Top in Blue - XL 14.50 Koop
ABERCROMBIE & FITCH Regular fit Button-down Top in Blue - XL 14.50 Koop
ABERCROMBIE & FITCH Regular fit Button-down Top in Blue - XL
$54.00 $11.00 Save 80%
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NORDSTROM Regular fit Button-down Top in White - 14 16.50 Koop
NORDSTROM Regular fit Button-down Top in White - 14 16.50 Koop
NORDSTROM Regular fit Button-down Top in White - 14
$64.00 $13.00 Save 80%
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GAP Regular fit Button-down Top in White - XL 11.25 Koop
GAP Regular fit Button-down Top in White - XL 11.25 Koop
GAP Regular fit Button-down Top in White - XL
$39.00 $9.00 Save 77%
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GEORGE Regular fit Sweatshirt in Gray - 12-18M 7.99 Koop
GEORGE Regular fit Sweatshirt in Gray - 12-18M 7.99 Koop
GEORGE Regular fit Sweatshirt in Gray - 12-18M
$22.00 $6.00 Save 73%
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DR SCHOLL'S Sandals in Brown - 3 11.35 Koop
DR SCHOLL'S Sandals in Brown - 3 11.35 Koop
DR SCHOLL'S Sandals in Brown - 3
$35.00 $9.00 Save 74%
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TEENY TOES Sneakers in Brown - 2W 7.89 Koop
TEENY TOES Sneakers in Brown - 2W 7.89 Koop
TEENY TOES Sneakers in Brown - 2W
$24.00 $6.00 Save 75%
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JOE FRESH Regular fit Jacket in Gray - L 9.79 Koop
JOE FRESH Regular fit Jacket in Gray - L 9.79 Koop
JOE FRESH Regular fit Jacket in Gray - L
$14.00 $8.00 Save 43%
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OLD NAVY Regular fit Sweatshirt in Gray - L 13.99 Koop
OLD NAVY Regular fit Sweatshirt in Gray - L 13.99 Koop
OLD NAVY Regular fit Sweatshirt in Gray - L
$40.00 $11.00 Save 73%
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SMALL PAUL Regular fit T-shirt in Pink - 9M 14.99 Koop
SMALL PAUL Regular fit T-shirt in Pink - 9M 14.99 Koop
SMALL PAUL Regular fit T-shirt in Pink - 9M
$49.00 $11.00 Save 78%
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GAP Regular fit Straight-legged Jean in Blue - 14 11.25 Koop
GAP Regular fit Straight-legged Jean in Blue - 14 11.25 Koop
GAP Regular fit Straight-legged Jean in Blue - 14
$44.00 $9.00 Save 80%
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U.S. POLO ASSN. Regular fit Straight-legged Jean in Blue - 11-12Y 8.59 Koop
U.S. POLO ASSN. Regular fit Straight-legged Jean in Blue - 11-12Y 8.59 Koop
U.S. POLO ASSN. Regular fit Straight-legged Jean in Blue - 11-12Y
$26.00 $7.00 Save 73%
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GAP Regular fit T-shirt in Blue - S 11.25 Koop
GAP Regular fit T-shirt in Blue - S 11.25 Koop
GAP Regular fit T-shirt in Blue - S
$39.00 $9.00 Save 77%
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UNDER ARMOUR Regular fit T-shirt in Blue - S
UNDER ARMOUR Regular fit T-shirt in Blue - S
UNDER ARMOUR Regular fit T-shirt in Blue - S
$49.00 $9.00 Save 82%
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NIKE Regular fit Sweatshirt in Blue - 4T 16.00 Koop
NIKE Regular fit Sweatshirt in Blue - 4T 16.00 Koop
NIKE Regular fit Sweatshirt in Blue - 4T
$64.00 $12.00 Save 81%
New with tags
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UNBRANDED Hat and Gloves in Black - 2-5T 9.99 Koop
UNBRANDED Hat and Gloves in Black - 2-5T 9.99 Koop
UNBRANDED Hat and Gloves in Black - 2-5T
$17.00 $8.00 Save 53%
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GEORGE Regular fit Button-down Top in Blue - 4 5.00 Koop
GEORGE Regular fit Button-down Top in Blue - 4 5.00 Koop
GEORGE Regular fit Button-down Top in Blue - 4
$18.00 $4.00 Save 78%
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NIKE Regular fit Pant in Black - 18M 17.00 Koop
NIKE Regular fit Pant in Black - 18M 17.00 Koop
NIKE Regular fit Pant in Black - 18M
$63.00 $13.00 Save 79%
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ATHLETIC WORKS Regular fit Pant in Blue - 18M 6.00 Koop
ATHLETIC WORKS Regular fit Pant in Blue - 18M 6.00 Koop
ATHLETIC WORKS Regular fit Pant in Blue - 18M
$15.00 $5.00 Save 67%
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KENNETH COLE Regular fit Straight-legged Jean in Blue - 3 9.99 Koop
KENNETH COLE Regular fit Straight-legged Jean in Blue - 3 9.99 Koop
KENNETH COLE Regular fit Straight-legged Jean in Blue - 3
$34.00 $8.00 Save 76%
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OLD NAVY Regular fit Button-down Top in Purple - 5 9.99 Koop
OLD NAVY Regular fit Button-down Top in Purple - 5 9.99 Koop
OLD NAVY Regular fit Button-down Top in Purple - 5
$28.00 $8.00 Save 71%
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UNBRANDED Regular fit Pant Shorts in Blue - M 7.99 Koop
UNBRANDED Regular fit Pant Shorts in Blue - M 7.99 Koop
UNBRANDED Regular fit Pant Shorts in Blue - M
$24.00 $7.00 Save 71%
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UNBRANDED Regular fit Button-down Top in Blue - 4 8.99 Koop
UNBRANDED Regular fit Button-down Top in Blue - 4 8.99 Koop
UNBRANDED Regular fit Button-down Top in Blue - 4
$24.00 $8.00 Save 67%
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KENNETH COLE Regular fit Straight-legged Jean in Blue - 24M 7.99 Koop
KENNETH COLE Regular fit Straight-legged Jean in Blue - 24M 7.99 Koop
KENNETH COLE Regular fit Straight-legged Jean in Blue - 24M
$34.00 $7.00 Save 79%
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LIQUID X Regular fit Straight-legged Jean in Blue - 3-4Y
LIQUID X Regular fit Straight-legged Jean in Blue - 3-4Y
LIQUIDX Regular fit Straight-legged Jean in Blue - 3-4Y
$35.00 $8.00 Save 77%
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GEORGE Regular fit Sweatshirt in Green - 5Y 4.99 Koop
GEORGE Regular fit Sweatshirt in Green - 5Y 4.99 Koop
GEORGE Regular fit Sweatshirt in Green - 5Y
$17.00 $4.00 Save 76%
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NEVADA Regular fit Jacket in Blue - 4 7.00 Koop
NEVADA Regular fit Jacket in Blue - 4 7.00 Koop
NEVADA Regular fit Jacket in Blue - 4
$44.00 $6.00 Save 86%
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WOODLAND Regular fit Sweatshirt in Blue - 6 9.99 Koop
WOODLAND Regular fit Sweatshirt in Blue - 6 9.99 Koop
WOODLAND Regular fit Sweatshirt in Blue - 6
$26.00 $8.00 Save 69%
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TOMMY HILFIGER Regular fit Button-down Top in Green - 7 15.99 Koop
TOMMY HILFIGER Regular fit Button-down Top in Green - 7 15.99 Koop
TOMMY HILFIGER Regular fit Button-down Top in Green - 7
$50.00 $13.00 Save 74%
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OLD NAVY Regular fit Button-down Top in Red - S 11.99 Koop
OLD NAVY Regular fit Button-down Top in Red - S 11.99 Koop
OLD NAVY Regular fit Button-down Top in Red - S
$28.00 $10.00 Save 64%
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DENIM & CO Regular fit Straight-legged Jean in Blue - 9-10Y 8.99 Koop
DENIM & CO Regular fit Straight-legged Jean in Blue - 9-10Y 8.99 Koop
DENIM & CO Regular fit Straight-legged Jean in Blue - 9-10Y
$20.00 $8.00 Save 60%
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PETIT BATEAU Regular fit Pant in Black - 24M 15.76 Koop
PETIT BATEAU Regular fit Pant in Black - 24M 15.76 Koop
PETIT BATEAU Regular fit Pant in Black - 24M
$111.00 $13.00 Save 88%
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ADIDAS Regular fit Pant Shorts in Blue - 12M 7.28 Koop
ADIDAS Regular fit Pant Shorts in Blue - 12M 7.28 Koop
ADIDAS Regular fit Pant Shorts in Blue - 12M
$44.00 $6.00 Save 86%
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CANADIENS DE MONTREAL Regular fit Sweatshirt in Blue - 6M 9.26 Koop
CANADIENS DE MONTREAL Regular fit Sweatshirt in Blue - 6M 9.26 Koop
CANADIENS DE MONTREAL Regular fit Sweatshirt in Blue - 6M
$54.00 $8.00 Save 85%
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UNBRANDED Regular fit Jacket in Gray - 6M 4.70 Koop
UNBRANDED Regular fit Jacket in Gray - 6M 4.70 Koop
UNBRANDED Regular fit Jacket in Gray - 6M
$25.00 $4.00 Save 84%