Carhartt Double Knees (WIP), pricey but a little better finish than original Carhartts and the measurements is more accurate than original... otherwise original Carhartt Double Front B136 (washed duck) or B01 (rigid duck) is also very good, pretty much same pant as WIP but half the price. Measurements can be little off. The biggest pros about these pants regardless WIP or original, is the canvas duck, so make sure you get the duck versions and not denim or twill versions. Canvas textile also forms better around your body, which will get you a better fit with time. Carhartt duck can also be found in other styles, like 5-pockets or more fitted pants.
Hoodies, check out Lady White super weighted... not a skate brand though, only blanks. Pricey but they will last you for years. I have some Polar, Anti-Hero and Hockeys that have been good, but they are all shit compared to real hoodie brands like Lady White or Reigning Champ.
For tees, Uniqlo U is the best blanks you can get. The quality is the same as Polar or Carhartt WIP but half the price. Sizing is same too. Will never buy any other tee.