Made some silnylon rain pants with vents in the inseam. Used 30D silnylon from DIY Gear Supply.
3/8" no curl elastic for the waist.
The vent flaps overlap by about 1.5" and the inner flap edge is rolled and sewn in a way that dripping rain will roll down the edge and out the vent instead of inside the pant leg.
The overlapping flaps are also sewn down/together in the middle so it doesn't flap/gape open.


vent flaps before sewing pants together.

Total weight: 84.1g/2.97 oz before sealing seams. Will seal them later.
Hopefully these will keep me nice and dry and minimize sweatiness.




