evo.com | Burton Day Packs > A skate pack and then some? We're in. The Burton Trebe Yell 21L Backpack makes working hard and playing harder that much easier with a nifty laptop sleeve, a hanging zippered accessory for the stuff you like to get to quick, ergonomic shoulder straps to keep things comfy, and it's all constructed with bluesign(R) approved materials that make sure the impact of production isn't detrimental. Pick a rad color that suits your style, and hit the ground running (or skating) in the Burton Trebe Yell 21L Backpack. Hanging Zippered Accessory Pocket bluesign(R) Approved 600D Recycled Polyester with PFC-free DWR and PU Backing Repels Water in Snow and Wintry-Mix Conditions This product may contain chemicals known to the State of California to cause cancer, or birth defects, or other reproductive harm. Ergonomic Shoulder Straps with an Adjustable Sternum Strap 19in x 12in x 7in / 47cm x 31cm x 17cm | Burton Trebe Yell 21L Backpack 2027 in Gray | Polyester