Cloud Silk Men's Trunk Underwear - Short Boxer Brief Cut Nylon Spandex Microfiber Shorts Lobbo?«. These extremely soft trunks are super light, stretchy, and breathable, yet are durable and great for everyday wear. They are constructed of a smooth and silky nylon spandex blend that almost feels like wearing nothing, but provides plenty of support (The name cloud silk does not refer to the fabric content). These also feature a contour pouch that enhances your profile and provides room for all-day comfort. These have a slightly sheer appearance because the fabric is so light and thin. Inseam is about 2.5 inches on size medium, and side seam is about 7.5 inches. Covered waistband. This men's microfiber trunk underwear is available in white and black, and in sizes Small 29-31", Medium 32-34", Large 34-35", and XL 36-37". Sizes above XL cost an additional amount. See dropdown size-color menu for upcharge amount.