First letter is size 

S = Small

M = Med

L = Large

XL = Extra Large

2 = 2XL

Second letter is inseam

S = Short 30

R = Regular 32

L = Long 34

Third letter is bootie size

M = Med 9-11

L = Large 12-13

• 100% postconsumer 4 layer fabric
• Double taped seems
• Gusseted crotch
• New fit for better motion and articulation
• YKK front zipper
• Updated shoulder straps that adjust for custom fit
• New wading belt with better fit and hold multi tools better, also front belt loops
• Insulated bootie with R1 nylon for warm and breathability
• Updated gravel guard for durability
• Internal dump pockets
• All front pockets can close, so no catching while rowing or casting