There are a small range of light weigh sports shorts available off the shelf

Main differences are the length of the leg and if they have some form of mesh lining or not

The best options can be viewed here:

Ramo: https://www.ramo.com.au/shop/item/mens-flex-shorts—4-way-stretch/flex-shorts

JB’s Wear: https://www.jbswear.com.au/product-detail/-in-product/7KSS

Gear For Life: http://www.gearforlife.com.au/polos-tees-catalogue/tees-shorts/shorts/dri-gear-xtf-shorts/ 

Biz Collection: https://www.bizcollection.com.au/au/products/st511m