The straps themselves appear strong (very stiff/ribbed). Not sure about the buckles as they are plastic but I knew it didn't feel like cheap plastic so it probably isn't a problem considering the price for three straps is very reasonable. The length corresponds to the specified, exactly 47 cm (without buckle). My waist is 38-40 inches and they fit perfectly. Although I'm not sure I can keep them. They are VERY LIGHT, almost metallic. Light gray looks like silver and beige looks like gold. Too shiny for me. Would love to give 3.5 stars and if they weren't so awesome I would give it a solid 4 stars.