Quick Take
Score: 8.7/10 | REI's house brand consistently delivers quality gear at better prices than name brands, and the Tarn 18 Kids is no exception. With Bluesign-approved recycled fabrics, proper hiking ergonomics, and REI's legendary satisfaction guarantee, this is the best value for outdoor-focused families who hold REI memberships.
Safety Analysis (30% weight)
REI Co-op products use Bluesign-approved fabrics with verified safe chemical processes. The Tarn 18 features recycled polyester (50% post-consumer) that meets strict environmental and safety standards. REI has committed to PFC-free DWR treatments across their product line, eliminating PFAS concerns. No vinyl or PVC components in the design.
Performance & Efficacy (30% weight)
The 18L capacity hits the sweet spot for ages 8-14 on day hikes and school use. Padded mesh back panel provides ventilation and comfort. Contoured shoulder straps with proper kids sizing prevent the slipping common with adult packs scaled down. Sternum strap included with adjustable height. Hip belt wings help distribute weight on longer hikes.
Multiple pockets include main compartment, front stash pocket, and stretch side pockets for water bottles. The hydration compatible design accepts a reservoir for trail use. Weight is a reasonable 1.1 lbs empty.
Value Assessment (20% weight)
At $45, the Tarn 18 undercuts comparable Osprey and Deuter options by $10-20 while matching their quality. REI members receive 10% back as dividend making the effective price even lower. The satisfaction guarantee means you can return it if it does not work out, no time limit.
The Bottom Line
The REI Co-op Tarn 18 is the best value for outdoor families. Bluesign certification, recycled materials, and proper hiking ergonomics at $45 with the REI guarantee. If you are an REI member, this should be your first consideration.






