Protec"s iPac cases feature modular walls and fit blocks that can be endlessly reconfigured to accommodate your ideal mix of instruments and accessories in one portable and protective unit. Features a water resistant sport nylon exterior, roomy exterior pocket with organizer, and padded shoulder strap. Comfort Features - Quick-lock closure - Backpackable with optional backpack strap (model #BPSTRAP) - Includes padded shoulder strap and ID tag Interior Features - Lightweight shock absorbing frame - Soft nylon lined interior - Mouthpiece pouches, dual, quantity 3 Exterior Features - Exterior pocket, oversized - Nylon exterior, 1680 gauge ballistic, water and abrasion resistant - Built-in organizer with two interior sleeves to hold pens, keys, and small accessories Exterior Dimensions: 14.25 (H) x 22.00 (W) x 8.00 (D) Interior Dimensions: 13.25 (H) x 21.00 (W) x 5.00 (D) Weight: 4.626 kg.