BAMBOO COOLMen’s Underwear Boxer Briefs Soft Comfortable Bamboo Viscose Underwear Trunks (4 Pack)

The ad says the fees are composed of bamboo vicos. But most of these have spandex as well can anyone tell me do these also have spandex?

35 waste, what size should i order?

White bamboo boxer briefs?

How long is the inseam for the Sport boxer brief compared to the boxer brief?