Check the listing for details. Protec BPSTRAP Padded Backpack Strap Replacement for Instrument Cases Musician. Color: Black, Condition: New with tags, Made in China. Listed at 21.99 USD. ProTec BPSTRAP Backpack Strap provides an ergonomic and comfortable carrying solution for compatible ProTec instrument cases and bags. Crafted from weather-resistant ballistic nylon, this strap features thick padding and a breathable mesh backside to ensure comfort during transport. The integrated elastic sternum support helps distribute weight evenly, while the adjustable design allows for a customized fit. Designed for easy attachment, it folds compactly for storage when not in use. Keywords: ProTec, backpack strap, instrument case strap, ballistic nylon, padded strap, musical instrument accessory, sternum strap, replacement strap, ergonomic strap, gig bag strap, travel gear, black strap Smoke-free home.