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Ultimate Direction Flexform II 500 Bottle

Size Guide
Size Guide - Ultimate Direction

MEN'S OUTERWEAR & TOP SIZING

Size Chest (in)/ Chest (cm) Waist (in)/ Waist (cm) Hip (in)/ Hip (cm) Arm Length (in)/ Arm Length (cm)
SM 36 - 38 / 91.44 - 96.52 30 - 33/ 76.20 - 83.82 35 - 38/ 88.90 - 96.52 32/ 81.28
MD 38 - 41/ 96.52 - 104.14 33 - 35/ 83.82 - 88.90 38 - 40/ 96.52 - 101.60 33/ 83.82
LG 41 - 43/ 104.14 - 109.22 35 - 37/ 88.90 - 93.98 40 - 43/ 101.60 - 109.22 34/ 86.36
XL 43 - 46/ 109.22 - 116.84 38 - 41/ 96.52 - 104.14 43 - 46/ 109.22 - 116.84 35/ 88.90

How to Measure: 

CHEST: Measure around the widest part of your chest, keeping the measuring tape horizontal.

WAIST: Measure around the narrowest part of your waist.

HIPS: Measure around the widest part of your hips.

SLEEVE LENGTH: Measure from the middle of the base of your neck, down your arm and to the wrist.

 

WOMEN'S OUTERWEAR & TOP SIZING

Size Chest (in)/ Chest (cm) Waist (in)/ Waist (cm) Hip (in)/ Hip (cm) Arm Length (in)/ Arm Length (cm)
XS 32 - 34/ 81.28 - 86.36 25 - 28/ 63.50 - 71.12 34 - 37/ 86.36 - 93.98 30/ 76.20
SM 34 - 36/ 86.36 - 91.44 28 - 30/ 71.12 - 76.20 37 - 39/ 93.98 - 99.06 31/ 78.74
MD 36 - 38/ 91.44 - 96.52 30 - 31/ 76.20 - 78.74 39 - 41/ 99.06 - 104.14 31/ 78.74
LG 38 - 40/ 96.52 - 101.60 31 - 34/ 78.74 - 86.36 41 - 43/ 104.14 - 109.22 32/ 81.28
XL 40 - 43/ 101.60 - 109.22 34 - 37/ 86.36 - 93.98 43-46/ 109.22-116.84 33/ 83.82

How to Measure: 

CHEST: Measure around the widest part of your chest, keeping the measuring tape horizontal.

WAIST: Measure around the narrowest part of your waist.

HIPS: Measure around the widest part of your hips.

SLEEVE LENGTH: Measure from the middle of the base of your neck, down your arm and to the wrist.

 

Ultimate Direction Men's/Unisex Running Vests

SIZE VEST SIZING (UNISEX)
SM 23 - 32 inch / 58 - 81 cm
MD 30 - 39 inch / 76 - 99 cm
LG 37 - 46 inch / 94 - 117 cm
XL 44 - 52 inch / 112 -132 cm



How to Meaure:

RIBS: Measure around the bottom of your ribs.

Ultimate Direction Women's Running Vestas

SIZE VEST SIZING (UNISEX)
SM 21 - 36 inch / 53 - 91 cm
MD 24 - 40 inch / 61 - 102 cm
LG 28 - 42 inch / 71 - 107 cm
XL 38 - 46 inch / 97 -117 cm

How to Meaure:

RIBS: Measure around the bottom of your ribs.

Ultimate Direction TRAIL VEST / HIGHLAND VEST SIZE CHART

SIZE VEST SIZING (UNISEX)
XS/SM 20 - 40 inch / 50.8 - 101.6 cm
MD/LG 30 - 46 inch / 76.2 - 116.84 cm

 

How to Meaure:

RIBS: Measure around the bottom of your ribs.

Ultimate Direction MEN'S/UNISEX PACKS

Size Torso (in)/Torso (cm) Chest (in)/Chest (cm)
SM/MD 17 / 43.18 26 - 39 / 66.04 - 99.06
MD/LG 18.5 / 46.99 36 - 48 / 91.44 - 121.92


How to Measure: 

TORSO: Measure the distance between the top edge of the shoulders or C7 vertebrae (the one that protrudes when looking down) to the top crest of the hip bone (pelvis).

CHEST: Measure around the widest part of your chest, keeping the measuring tape horizontal.

Ultimate Direction Fastpackher

Size Torso (cm) Chest (cm)
SM/MD 36.83 60.96 - 95.25
MD/LG 40.64 88.90 - 106.68


How to Measure: 

TORSO: Measure the distance between the top edge of the shoulders or C7 vertebrae (the one that protrudes when looking down) to the top crest of the hip bone (pelvis).

CHEST: Measure around the widest part of your chest, keeping the measuring tape horizontal.

 

Ultimate Direction Fastpackher 2.0

Size Chest (in)
X/S 21-47
M/L 23-49


How to Measure: 

TORSO: Measure the distance between the top edge of the shoulders or C7 vertebrae (the one that protrudes when looking down) to the top crest of the hip bone (pelvis).

CHEST: Measure around the widest part of your chest, keeping the measuring tape horizontal.

Ultimate Direction ULTRA GAITER

Size Men's Shoes Women's Shoes
SM US 5-10 EU 37-43 US 7-12 EU 37-43
MD US 8-11 EU 41-44 US 10-13 EU 41-44
LG US 9-13 EU 42-47 US 11-14 EU 42-47

 

Ultimate Direction Socks

Shoes Size (US Size) S/M L/XL
Women's US 6-10 US 11-14
Men's US 7-9 US 10+

 

Ultimate Direction Women's Bottom Sizing

SizeSize Waist (in)Waist (cm) Hip (in)Hip (cm)
XSXS 24 - 2660.96 - 66.04 34 - 3686.36 - 91.44
SMSM 27 - 2868.58 - 71.12 37 - 3993.98 - 99.06
MDMD 29 - 3173.66 - 78.74 39 - 4199.06 - 104.14
LGLG 32 - 3481.28 - 86.36 41 - 43104.14 - 109.22

How to Measure: 

WAIST: Measure around the narrowest part of your waist, keeping the measuring tape horizontal.

HIPS: Measure around the widest part of your hips.

 

2 items left

Ultimate Direction Flexform II 500 Bottle

Ultimate Direction Flexform II 500 Bottle

2026-08-10 2026-08-17

With its durable, but extremely pliable construction, the Ultimate Direction FlexForm 500 Bottle is a great at-the-ready hydration option for running vests and packs (both sold separately). The 16.9 oz-capacity bottle weighs just 2.3 ounces when empty and has a soft silicone bite valve that ensures a leak-proof carry while delivering high-flow output when you're ready to hydrate.

The ergonomic shape of the bottle makes it fit comfortably in the pockets of running vests and packs, be they located up front, on the side, or in the back. It also allows the bottle to fit comfortably in your hand. The soft BPA-free polyethylene material is FDA-approved and dishwasher safe (top rack only).

  • 500 ml (16.9 oz) capacity
  • 2.3 oz
  • FDA-approved Polyethylene (BPA-free)
Best Use: Backpacking, Hiking, Running/Fitness
Item Weight: 2.3 oz
Warranty: One-Year Limited
Type: Water Bottle
Capacity: 16.9 oz
Material: FDA-approved, BPA-free Polyethylene

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