The 21L Gravestone Backpack offers 21 liters of perfectly designed space for both training and everyday use. Featuring water-resistant fabrication, sectioned storage, and aluminum hardware. Two separate zippered compartments offer ample storage and a bottom access zipper for separation from shoes. Internal padded laptop sleeve along with a felt lined zippered pocket allows you to move through your training days with preparation. The left hand side features a water bottle storage pocket, perfect for the 32oz Stainless Steel Bottles. The Gravestone 21L Backpack full features: // Durable water-resistant 900D TPU coated Polyester fabric // Bottom access vented shoe pocket // Aluminum d-rings // Custom Gymreapers molded EVA foam backing // External side bottle storage (up to 32 oz) // Padded sleeve compatible with 16” electronics // UTX and YKK hardware // Patent pending