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Halo A°R Socks

By Fourth Element

€140,00 EUR

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✓ highly advanced thermal technology | ✓ HALO A°R's achieves extreme thermal protection | ✓ thinner, less buoyant

Fit

Small

True to size

Large

Size

Description

The HALO A°R Socks are Fourth Element’s warmest drysuit socks to date, combining aerospace-grade insulation technology with a low-bulk, high-performance design for extreme cold-water diving. Developed for divers who spend extended time in cold environments, the HALO A°R Socks use advanced Inner Space Technology with A°RGON™ aerogel insulation. This material, originally developed for space and cryogenic applications, delivers phenomenal insulation while remaining thin, flexible and less buoyant than traditional alternatives.

The A°RGON™ aerogel is embedded in a compression-resistant matrix, allowing the socks to maintain insulation performance even under pressure. A soft fleece lining enhances comfort, while the wind- and water-repellent stretch outer layer allows the socks to be worn comfortably throughout the day.

With a three-layer construction throughout, the HALO A°R Socks offer noticeably more insulation than standard drysuit socks while keeping bulk to a minimum. Correct sizing is essential and should be based on shoe size rather than drysuit boot size. Divers using tight-fitting drysuit boots may need additional room to accommodate the sock thickness.

As a key highlight of Fourth Element’s 2026 range, the HALO A°R Socks are designed for serious cold-water divers who prioritise warmth, efficiency and long-term comfort.

Features & Fitting

A°RGON™ aerogel extreme thermal insulation
High insulation with reduced thickness and buoyancy
Three-layer construction for cold-water performance
Soft fleece inner lining
Water-repellent outer layer
Stretch fabric for a close, comfortable fit
Machine washable
The socks feature three layers throughout and, therefore, are slightly thicker than the Hotfoot Pro.
Order the socks according to your shoe size, rather than the size of the boots on your drysuit, as a snug fit is essential.
In some cases, there may not be enough room in your drysuit boot when using the HALO A°R Sock.
If you are using an Argonaut drysuit, try removing the footbed for a little more room.
If you are purchasing a drysuit, consider sizing your boots one size up, especially if you are at the upper end of a size.

Fabric & Care

68% Polyester
32% recycled S.Cafe Polyester
4% Spandex

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Halo A°R Socks

XS - EU 37

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extreme thermal protection

HALO A°R

Inner space technology

About A°RGON™

A°RGON™ is an advanced form of Aerogel originally developed for spacecraft and cryogenic insulation due to its exceptional thermal properties. This high-performance material allows the HALO A°R undersuit and thermal diving gloves to provide superior insulation while remaining thinner and less buoyant than traditional options.

Let customers speak for us

from 1 reviews

Sizes	Height		Chest		Waist		Inside Legs
	CM	INCHES	CM	INCHES	CM	INCHES	CM	INCHES
XS Short	161 - 169	63 - 66	76 - 86	30 - 34	58 - 68	23 - 27	73 - 77	29 - 31
XS	165 - 173	65 - 68	76 - 86	30 - 34	58 - 68	23 - 27	76 - 80	30 - 32
S Short	165 - 173	65 - 68	86 - 96	34 - 38	68 - 78	27 - 31	76 - 80	30 - 32
S	170 - 178	67 - 70	86 - 96	34 - 38	68 - 78	27 - 31	79 - 83	31 - 33
S Tall	176 - 183	69 - 72	86 - 96	34 - 38	68 - 78	27 - 31	82 - 86	33 - 34
M Short	170 - 178	67 - 70	96 - 106	38 - 42	78 - 88	31 - 35	79 - 83	31 - 33
M	176 - 183	69 - 72	96 - 106	38 - 42	78 - 88	31 - 35	82 - 86	33 - 34
M Tall	181 - 188	71 - 74	96 - 106	38 - 42	78 - 88	31 - 35	85 - 89	34 - 35
L Short	176 - 183	69 - 72	106 - 116	42 - 46	88 - 98	35 - 39	82 - 86	33 - 34
L	181 - 188	71 - 74	106 - 116	42 - 46	88 - 98	35 - 39	85 - 89	34 - 35
L Tall	186 - 193	73 - 76	106 - 116	42 - 46	88 - 98	35 - 39	88 - 92	35 - 36
XL Short	181 - 188	71 - 74	116 - 126	46 - 50	98 - 108	39 - 43	85 - 89	34 - 35
XL	186 - 193	73 - 76	116 - 126	46 - 50	98 - 108	39 - 43	88 - 92	35 - 36
XL Tall	191 - 198	75 - 78	116 - 126	46 - 50	98 - 108	39 - 43	91 - 95	36 - 38
XXL Short	186 - 193	73 - 76	126 - 136	50 - 54	108 - 118	43 - 47	88 - 92	35 - 36
XXL	191 - 198	75 - 78	126 - 136	50 - 54	108 - 118	43 - 47	91 - 95	36 - 38
XXXL Short	191 - 198	75 - 78	136 - 146	54 - 58	118 - 128	47 - 51	91 - 95	36 - 38
XXXL	196 - 203	77 - 80	136 - 146	54 - 58	118 - 128	47 - 51	94 - 98	37 - 39

Universal	Height		Chest		Waist		Hips		Inside Legs
	CM	INCHES	CM	INCHES	CM	INCHES	CM	INCHES	CM	INCHES
XXS Short	158 - 166	62 - 65	68 - 76	27 - 30	51 - 59	20 - 23	76 - 84	30 - 33	69 - 73	27 - 29
XXS	160 - 168	63 - 66	68 - 76	27 - 30	51 - 59	20 - 23	76 - 84	30 - 33	71 - 75	28 - 30
XS Short	160 - 168	63 - 66	74 - 82	29 - 33	57 - 65	23 - 26	82 - 90	33 - 36	71 - 75	28 - 30
XS	163 - 170	64 - 67	74 - 82	29 - 33	57 - 65	23 - 26	82 - 90	33 - 36	73 - 77	29 - 31
S Short	163 - 170	64 - 67	80 - 88	32 - 35	63 - 71	25 - 28	88 - 96	35 - 38	73 - 77	29 - 31
S	165 - 173	65 - 68	80 - 88	32 - 35	63 - 71	25 - 28	88 - 96	35 - 38	75 - 79	30 - 31
M Short	165 - 173	65 - 68	86 - 94	34 - 37	69 - 77	27 - 31	94 - 102	37 - 40	75 - 79	30 - 31
M	168 - 175	66 - 69	86 - 94	34 - 37	69 - 77	27 - 31	94 - 102	37 - 40	77 - 81	31 - 32
M/L	168 - 175	66 - 69	86 - 94	34 - 37	75 - 83	30 - 33	100 - 108	40 - 43	77 - 81	31 - 32
L Short	168 - 175	66 - 69	92 - 100	36 - 40	75 - 83	30 - 33	100 - 108	40 - 43	77 - 81	31 - 32
L	170 - 178	67 - 70	92 - 100	36 - 40	75 - 83	30 - 33	100 - 108	40 - 43	79 - 83	31 - 33
XL Short	170 - 178	67 - 70	98 - 106	39 - 42	81 - 89	32 - 35	106 - 114	42 - 45	79 - 83	31 - 33
XL	173 - 180	68 - 71	98 - 106	39 - 42	81 - 89	32 - 35	106 - 114	42 - 45	81 - 85	32 - 34
XXL Short	170 - 178	67 - 70	104 - 112	44 - 44	87 - 95	35 - 38	112 - 120	44 - 47	79 - 83	31 - 33
XXL	173 - 180	68 - 71	104 - 112	41 - 44	87 - 95	35 - 38	112 - 120	44 - 47	81 - 85	32 - 34
XXXL Short	170 - 178	67 - 70	110 - 118	44 - 47	93 - 101	37 - 40	118 - 126	47 - 50	79 - 83	31 - 33
XXXL	173 - 180	68 - 71	110 - 118	44 - 47	93 - 101	37 - 40	118 - 126	47 - 50	81 - 85	32 - 34

Size (Unisex)	Womens UK	Womens US	Height		Chest
			CM	INCHES	CM	INCHES
XXS	6	4	147 - 160	58 - 63	56 - 71	22 - 28
XS	8	6	155 - 168	61 - 66	69 - 84	27 - 33
S	10/12	08/10	163 - 175	64 - 69	81 - 97	32 - 38
M	14/16	12/14	170 - 183	67 - 72	94 - 109	37 - 43
L	18/20	16/18	178 - 191	70 - 75	107 - 122	42 - 48
XL	22	20	185 - 198	71 - 78	119 - 135	47 - 53

	XS	S	S	M	M	L	L	XL	XXL	XXL
UK	4	5	6	7	8	9	10	11	12	13
US	5	6	7	8	9	10	11	12	13	14
EU	37	38	39.5	41	42	43	44.5	46	47	48

Size	Head circumference
	CM	INCHES
M	53 - 59	21 - 23
L	56 - 61	22 - 24
XL	59 - 64	23 - 25

Size	Palm circumference
	CM	INCHES
XS	17 - 19	7 - 8
S	19 - 21	8 - 8
M	21 - 23	8 - 9
L	23 - 25	9 - 10
XL	25 - 27	10 - 11
XXL	27 - 29	11 - 12