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Sea to Summit

Sea to Summit Spark SpIII Sleeping Bag regular light grey/yellow (2021)

ID: 936168
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Product Description

All Spark sleeping bags are characterised by their ultra-light weight, minimal packing size and excellent thermal performance. The SpIII's fully stitched vertical boxing chambers contain an extra amount of down and reduce cold bridges. The expedition size provides extra space for extra layers of clothing. The vertical chambers in the chest area optimize the distribution of the down and prevent slipping. The full-sided zipper with two sliders allows easy access and variable ventilation. A zipper channel, a hood and a heat collar prevent heat loss.

Ultra Dry Down
UltraDry Down is a PFC-free water-repellant treatment applied to the down used in all Sea to Summit sleeping bags. UltraDry Down retains over 60 % more loft, absorbs 30 % less moisture and dries out 60 % faster when compared to untreated down – which means the down will insulate better even in damp conditions. The treatment also inhibits bacterial growth, making your bag last longer. UltraDry Down treatment is an environmentally friendly application.


  • Ultralight 7D and 10D material for minimum weight and packing size
  • Down treatment for maximum insulation values
  • Contoured mummy shape guarantees efficient insulation
  • Vertical breast chambers protect against cold bridges
  • Note: Cannot be zipped together with other sleeping bags
  • hip circumference: 135 cm
season: 3-season sleeping bag  
Sleeping Bag
Category: Down sleeping bag
Form: Mummy form
Temperature Range
Comfort Temperature (°C): -2
Max temperature: -8 °C
Extreme temperature: -26 °C
Cover material detail: 100% nylon
Lining detail: 100% nylon
Filling: Goose down
Special features: Contains non-textile parts of animal origin
Down Mix (Down/Feather)
Fill Power (cuin)
850 cuin  
Sleeping bag: 665 g
Filling: 430 g
Height (max): 183 cm
Package size (L x W): 35 x 15
Model year
Product number
Customer Ratings
1 Customer Ratings
5 Stars
4 Stars
3 Stars
2 Stars
1 star
Warm, light and comfortable
Warm, leicht und komfortabel
Translated from German To the original

Have had this sleeping bag for some time on my list and slammed here because of the relatively low price. The sleeping bag is packable small and keeps extremely warm without being sweaty (inner material very comfortable on the skin). I last tested it at night in the woods with light rain and about 3 ° -5 ° in the bible bag (NL Goretex bivy). I left the closure half open (otherwise too warm) and was able to sleep through pleasantly. The material is thin, but does not feel fragile or vulnerable. Due to the very dense arrangement of the 10D / 7D fibers, the bag takes up the air after unpacking relatively slowly - it is therefore advisable to shake the sleeping bag well right after unpacking. For the same reason, it is also relatively tedious to pack the sleeping bag again, because the air remains stubbornly balloon-like in the bag. However, this speaks for positive insulation properties, since the warm air from the sleeping bag can not "diffuse out" so quickly. positive + very small pack size + very warm and pleasant on the skin + Zipper (almost) over the full length (unlike SP0 / 1/2) + Beautiful color - especially in the interior (makes beautiful atmosphere in the tent light) + Cozy hood + Not too tight (am 178, 78kg, athletic) Neutral o It takes a long time to build up o It is relatively tedious to pack the sleeping bag again, because the air escapes only with difficulty o the enclosed storage bag is too small in my opinion negative - Zipper is hakelig, because very small. I would rather wear 40-50g more with a 5mm zipper Tips: - do not compress too much in the enclosed compression bag - store open - e.g. in the wardrobe on a hanger - does not buy _ SP1 / SP2. The extra charge for the Sp3 is not too high compared to the total price. The higher total weight (+ 200g) is almost entirely attributable to the larger amount of down - Best SP0 for the midsummer (or Yeti Passion One with a full-zipper), SP3 for the (German) Autumn / Spring and SP0 + SP3 for the winter

Habe diesen Schlafsack schon länger auf meiner Liste gehabt und hier aufgrund des relativ günstigen Preises zugeschlagen. Der Schlafsack ist klein verpackbar und hält extrem warm ohne jedoch schwitzig zu sein (Innenmaterial sehr angenehm auf der Haut). Habe ihn zuletzt Nachts im Wald bei leichtem Regen und etwa 3°-5° im Biwacksack (NL Goretex bivy) getestet. Ich habe den Verschluss zur Hälfte offen gelassen (da sonst zu warm) und konnte angenehm durchschlafen. Das Material ist zwar dünn, fühlt sich aber keineswegs labil oder anfällig an. Aufgrund der sehr dichten Anordnung der 10D/7D Fasern nimmt der Schlafsack nach dem Auspacken relativ langsam die Luft auf -- es ist deshalb ratsam den Schlafsack direkt nach dem Auspacken gut durchzuschütteln. Aus dem selben Grund ist es auch relativ langwierig den Schlafsack wieder einzupacken, weil die Luft hartnäckig Ballon-artig im Sack verbleibt. Dies spricht jedoch für positive Isolationseigenschaften, da die warme Luft aus dem Schlafsack nicht so schnell "hinaus diffundieren" kann. Positiv + sehr kleines Packmaß + sehr warm und angenehm auf der Haut + Reißverschluss (fast) über die komplette Länge (im Gegensatz zu SP0/1/2) + Schöne Farbe -- vor allem im Inneren (macht schöne Atmosphäre im Zeltlicht) + Kuschelige Kapuze + Nicht zu eng (bin 178, 78kg, sportlich) Neutral o Braucht relativ lange, um sich aufzubauschen o Es ist relativ mühsam den Schlafsack wieder einzupacken, weil die Luft nur schwer entweicht o der beigelegte Aufbewahrungssack ist meiner Meinung nach zu klein dimensioniert Negativ - Reißverschluss ist hakelig, da sehr klein. Ich würde lieber 40-50g mehr tragen mit einem 5mm Zipper Tipps: - nicht zu stark komprimieren im beigelegten Kompressionssack - offen lagern -- z.B. im Kleiderschrank auf einem Bügel - kauft _nicht_ SP1/SP2. Der Aufpreis zum Sp3 ist nicht zu hoch verglichen mit dem Gesamtpreis. Das höhere Gesamtgewicht (+200g) ist fast auschließlich auf die größere Daunenmenge zurückzuführen - am besten SP0 für den Hochsommer (oder Yeti Passion One mit einem full-zipper), SP3 für den (deutschen) Herbst/Frühling und SP0+SP3 für den Winter

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