The other type of external frame which recently was proposed, is made from composite plastic which is not flexible like current backpack straps and also it is a kind of material that can be shaped like human spine curvature. In this type of backpack, load directly transfers to the shoulders through the non-flexible straps. This non-flexible structure diminishes the momentum at lumbar region of the back. Strap curvature is shaped close to spine curvature and there are two flexible drawstrings to prevent backpack movement in transverse plane. The straps of this backpack are wide enough to distribute the pressure on shoulders and also a white glass wool layer is added to the internal part of them to absorb dynamic forces, which could be produced through walking. This backpack type is an experimental sample that need further options to be prepared for usage. One of the benefits of backpack with external frame is preventing the spine to incline forward during walking that would be helpful in preventing damage of long term backpack carrying.[4] https://i.pinimg.com/originals/da/68/73/da68737db785708f30ef69ce04411090.jpg
2. To redeem this offer, Hostesses with a qualifying party of $600 or more may choose the Close To Home™ Caddy for $14.40, Close To Home™ Tray for $17.40, Close To Home™ Table Gallery for $17.40, Close To Home™ Décor Box for $20.40 or Close To Home™ Round Tray for $20.40. Includes personalization. Limit one per Hostess. Qualifying party sales exclude tax, shipping and all Hostess Rewards. Valid for qualifying party orders submitted April 1-30, 2019. Prior to tax and shipping. While supplies last. Customer Specials and Hostess Rewards cannot be combined. https://i.pinimg.com/236x/f2/b3/b2/f2b3b2b165ab4485ec6c200dc98ad4db.jpg
Rolling backpacks are backpacks with wheels on the bottom and an extending handle. Because of their design, rolling backpacks reduce the strain on the user, though the shoulder straps may be used to carry the pack for short distances when the terrain is not suitable for wheels. Rolling backpacks are most commonly used while traveling by airplane or train. https://i.pinimg.com/236x/1c/15/c1/1c15c163dbe92b6fcfa64e5c1f0edbd3--life-changing-container-sales.jpg
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