Home Siren 4 Thermo Mid Zip Waterproof

Siren 4 Thermo Mid Zip Waterproof

Regular price $190.00 Sale price $57.00
70% OFF
Color: Diorite

Color
Size: 5

Size

size

Size Guide

Size Guide

Hiking, trail & outdoor footwear and apparel — US / UK / EU / CM.

Men’s Hiking & Trail Footwear

US UK EU JP (cm)
7 6 40 25
7.5 6.5 40.5 25.5
8 7 41 26
8.5 7.5 42 26.5
9 8 42.5 27
9.5 8.5 43 27.5
10 9 44 28
10.5 9.5 44.5 28.5
11 10 45 29
11.5 10.5 46 29.5
12 11 46.5 30
13 12 48 31
14 13 49 32

Women’s Hiking & Trail Footwear

US UK EU JP (cm)
5 2.5 35 22
5.5 3 35.5 22.5
6 3.5 36 23
6.5 4 37 23.5
7 4.5 37.5 24
7.5 5 38 24.5
8 5.5 38.5 25
8.5 6 39 25.5
9 6.5 40 26
9.5 7 40.5 26.5
10 7.5 41 27
10.5 8 42 27.5
11 8.5 42.5 28

Unisex Footwear Conversion

Unisex / Men’s US Women’s US UK EU CM
6 7.5 5.5 39 24
7 8.5 6.5 40 25
8 9.5 7.5 41 26
9 10.5 8.5 42.5 27
10 11.5 9.5 44 28
11 12.5 10.5 45 29
12 13.5 11.5 46.5 30

Unisex styles follow men’s sizing. Women usually choose 1.5 sizes smaller than their regular US women’s size.

Men’s Apparel

Size Chest Waist Inseam
S 36–38 in / 91–96 cm 28–30 in / 71–76 cm 31 in / 79 cm
M 39–41 in / 99–104 cm 31–33 in / 79–84 cm 32 in / 81 cm
L 42–44 in / 107–112 cm 34–36 in / 86–91 cm 32.5 in / 83 cm
XL 45–47 in / 114–119 cm 38–40 in / 96–102 cm 33 in / 84 cm
XXL 48–51 in / 122–130 cm 41–43 in / 104–109 cm 33.5 in / 85 cm

Women’s Apparel

Size Bust Waist Hip
XS 32–33 in / 81–84 cm 25–26 in / 64–66 cm 34–35 in / 86–89 cm
S 34–35 in / 86–89 cm 27–28 in / 69–71 cm 36–37 in / 91–94 cm
M 36–37 in / 91–94 cm 29–30 in / 74–76 cm 38–39 in / 96–99 cm
L 38–40 in / 96–102 cm 31–33 in / 79–84 cm 40–42 in / 102–107 cm
XL 41–43 in / 104–109 cm 37–39 in / 94–99 cm 43–45 in / 109–114 cm

How to measure

  • Chest: measure around the fullest part, arms relaxed.
  • Waist: measure at the natural waistline.
  • Hip: measure around the fullest part of the hips.
  • Inseam: measure from crotch to ankle bone.
  • For hiking socks/insoles, consider half a size up in footwear.

Estimate delivery times: 12-26 days (International), 3-6 days (United States).

Return within 60 days of purchase. Duties & taxes are non-refundable.

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Siren 4 Thermo Mid Zip Waterproof

Siren 4 Thermo Mid Zip Waterproof

Made For: Winter hikes

Built for women who refuse to wait for perfect weather. These waterproof hiking boots are engineered with a female-focused fit and Vibram® Icetrek traction that conquers the coldest terrain. Premium leather construction meets cozy knit details—because technical performance doesn't mean sacrificing style.

  • Best for: Winter Hike
  • Insulation:
  • 200 grams Primaloft® Gold Eco Series synthetic insulation. Solarcore® Aerogel insole provides underfoot superior warmth while being extremely flexible and ultra-thin.
  • Waterproofing: Waterproof full grain leather upper, complete with a waterproof membrane seals out water and lets moisture escape.
  • Traction: Vibram® Icetrek outsole designed to provide the improved grip on very cold, icy, or snowy surfaces. Vibram traction lugs specifically designed to increase traction and shed debris with each step
  • Comfort Features:
  • Heavy-duty, Waterproof, YKK zipper for easy on and off
  • Bellows tongue keeps out debris
  • Protective and abrasion resistant rubber toe cap
  • Cleansport NXT™ treated for natural odor control
  • FloatPro™ Foam midsole for lightweight comfort that lasts
  • Materials:
  • Waterproof full grain leather and knit upper
  • 100% recycled laces and webbing
  • 100% recycled fleece lining
  • 100% recycled mesh footbed cover
  • 5% recycled PU removable footbed
  • Additional Measurements:
  • Stack Height: 28.5-20.5mm
  • Drop: 8mm
  • Lug: 5mm
  • Shaft height (top of midsole to top of boot): 5.91in, 150mm
  • Half pair weight: 1lbs-3.04oz, 540g