I don’t believe the specific type of sunglasses is actually said anywhere, but this website (http://sunglassshack.com/items/movie~tv-sunglasses/that-70-s-tv-show-celebrity-steve-hyde-sunglasses-detail.htm) shows details about sunglasses that look pretty darn close to his!
My little brother found a pair of Lacoste sunglasses at Savers for like three bucks (crazy sweet deal right?) anyway these are EXACTLY like hyde’s but i can’t find any ionformation on them anywhere, or any pairs for sale or anything! the ones they sell online look stupid and bot even close to hyde’s
you want a squarer frame aviator but that are still nice and long, and BROWN lenses that fade.
i know lacoste was featured in a lot of the costumes of the people in the show (kelso’s shirts) so it wouldn’t surprise me if hyde’s glasses actually were the same model as my brothers