Patagonia R1 Fleece Jacket vs Rab Alpha Flash
Weight and specs compared for 2026 — and which one to choose.
Midweight fleece jacket made from Polartec Powergrid (93% recycled polyester, 7% spandex). Excellent breathability and moisture management for aerobic hiking. M...
Lightweight fleece jacket using Polartec Alpha Direct fabric. Breathable and packable mid-layer for expeditions with minimalist weight philosophy.
Building a pack? Add either one to your HikeLoad list, or drop its weight into the base weight calculator, and see what it does to your total weight.
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Patagonia R1 Fleece Jacket vs Rab Alpha Flash: which should you buy?
If saving weight is your priority, the Rab Alpha Flash wins — at 255 g it is 51 g (17%) lighter than the Patagonia R1 Fleece Jacket (306 g). That said, the heavier option may justify the extra grams with more capacity, durability or comfort, so weigh the trade-off against how you'll use it.
See where both rank against everything else in this category on the lightest clothing - mid layer page, or browse the full gear weight database.