Fox 40 Micro Whistle vs ResQLink PLB-375

Weight and specs compared for 2026 — and which one to choose.

Fox 40 Micro Whistle is the lighter option — 125 g lighter than the ResQLink PLB-375 (93% less weight). If grams matter to you, that is the one to beat.

Spec	Fox 40 Micro Whistle	ResQLink PLB-375
Weight	10 g · 0.010 kg · 0.02 lb	135 g · 0.135 kg · 0.30 lb
Brand	Fox 40	ResQLink
Category	Safety	Safety

Fox 40 Micro Whistle

10 g

Pealess safety whistle audible up to 1km.

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ResQLink PLB-375

135 g

Personal Locator Beacon. Activates free search and rescue.

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Fox 40 Micro Whistle vs ResQLink PLB-375: which should you buy?

If saving weight is your priority, the Fox 40 Micro Whistle wins — at 10 g it is 125 g (93%) lighter than the ResQLink PLB-375 (135 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 safety page, or browse the full gear weight database.

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