Relaxed Daypack: This hiking backpack is specially designed for traveling enthusiasts, ergonomic padded shoulder straps and back fortify,will provide you with more Relaxed feeling.Breathable mesh shoulder straps with plentiful sponge padding assist relieve the strain out of your shoulder. Widened and thickened S-sort shoulder straps and high elastic breathable back fortify for highest ventilation and easing burden.And this pack does not have an internal or external frame.