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Heavy backpacks put force on the spine, which causes muscle strain, distorts the natural curve of the spine, and compresses the intervertebral discs
Its also available in a larger size
It delivers the same legendary performance you expect from our Black Hole bags, but with a huge step toward impact reduction with 100% recycled body fabric, lining and webbing, and now a pioneering recycled TPU-film laminate with a sleek matte fini
doi: 10.1007/s11033-010-0289-6 339 WebsterJ
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