LITEWAY WHISTLE
The Whistle is the pared-back version of our Trinket-Whistle: small, bright, and seriously loud. A special two-chamber design produces a sharp, carrying sound that grabs attention and cuts through wind and distance.

It's a genuine must-have for trail running, orienteering, and racing, where a quick, audible signal can matter — and it comes in a wide range of bright colours.
Highlights
Loud, two-chamber design — a piercing sound that carries far.
Featherweight — just 3 g, you won't notice it.
Easy to carry — puller loop for clipping to a ring, zipper pull, or shoulder strap.
Material
Made from PLA (polylactic acid) — a plant-based polyester derived from renewable crops like corn, sugar cane, or sugar beet, and biodegradable.
Characteristics
- Dimensions: 49 × 7 × 9 mm
- Weight: 3 g
- Material: PLA (plant-based, biodegradable)
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Ultralight Backpacks