Pocket Sprung Mattress Tog and Depth Guide
When choosing a pocket sprung mattress, tog rating determines seasonal warmth while depth affects how the mattress sits in your bed frame, its overall support feel and compatibility with sheets and protectors. UK standard mattress sizes include small single 75x190cm (2ft6), single 90x190cm (3ft), small double 120x190cm (4ft), double 135x190cm (4ft6), king 150x200cm (5ft) and super king 180x200cm (6ft). This guide gives concrete measurements, checklists and decision rules so you can match tog and depth to your needs.
What is Tog Rating on a Mattress?
Tog measures thermal resistance – how well the mattress retains body heat. Higher tog numbers mean warmer sleep; lower numbers suit hotter conditions or summer use. Most pocket sprung mattresses fall between 4.5 and 13.5 tog. A 4.5-7 tog mattress works for warm sleepers or summer-only use. 9-10.5 tog offers year-round balance for most UK bedrooms. Above 12 tog suits very cold rooms or those who feel the cold easily.
Unlike duvets, mattress tog cannot be changed seasonally unless you choose a dual-season design with removable layers. Check your bedroom temperature: below 16°C often needs higher tog; above 20°C benefits from lower tog. Always pair with appropriate bedding – a 10.5 tog mattress under a 13.5 tog duvet can feel too warm in mild weather.
Understanding Mattress Depth for Pocket Sprung Designs
Depth (sometimes called thickness) typically ranges from 20cm to 35cm on pocket sprung mattresses, though exact figures vary by model. Shallower depths (around 20-25cm) suit platform beds or those with divan bases that have high sides. Deeper mattresses (28cm+) work better on low frames or where you want a luxurious, plush profile that sits proud of the frame.
Depth also influences edge support and how well the mattress fills the bedstead. Measure your bed frame’s internal depth and add at least 2cm clearance for easy sheet tucking. A mattress that is too shallow can leave gaps at the sides; one that is too deep may make sheet fitting difficult and increase pressure on seams. For bunk beds meeting BS EN 747, the top-bunk guard rail must rise at least 16cm above the mattress surface, so follow the maximum depth stated by the bed maker. Top bunks are not recommended for children under 6.
How Tog and Depth Work Together in Pocket Sprung Mattresses
Pocket sprung cores use individually wrapped springs that adapt to body shape. Adding memory foam, latex or wool layers changes both depth and thermal properties. A deeper pocket sprung mattress with thick wool or cotton fillings often carries a higher tog because these natural fibres trap air. Conversely, gel-infused layers in deeper hybrids can reduce perceived heat.
Decision rule: if you need high tog for winter warmth, expect a depth of at least 25cm. For cooler summer sleep, choose a shallower 20-24cm model with breathable covers. Always check the product page for exact specifications as names alone do not list precise tog or depth values.
Choosing the Right Tog and Depth by UK Mattress Size
Larger surface areas lose heat faster, so king 150x200cm and super king 180x200cm mattresses often benefit from 10.5-13.5 tog for couples where one partner feels cold. Smaller single 90x190cm or kids’ mattresses (cot 60x120cm, cot bed 70x140cm) can use lower tog because children generate more body heat.
Checklist for size and depth match:
- Measure frame depth and add 2-4cm for sheet tuck.
- For divan bases, ensure total height (base + mattress) reaches 60-65cm for easy sitting.
- In bunk beds, confirm top mattress depth keeps guard rail 16cm above surface.
- EU sizes differ (EU double 140x200cm, EU single 90x200cm) – double-check labels if buying mixed UK/EU components.
All UK mattresses must meet Furniture and Furnishings (Fire) (Safety) Regulations 1988 and BS 7177 fire safety standards.
Practical Checklist Before Buying
Use this checklist to combine tog, depth and pocket sprung benefits:
- Decide seasonal need: warm sleeper or cold room → aim for 10.5+ tog; hot sleeper → 7 tog or less.
- Measure existing bed frame depth and height from floor.
- Choose depth that clears frame sides by minimum 2cm but does not exceed sheet depth plus protector.
- For children, select from Kids' Pocket Sprung Mattresses and confirm maximum depth against bunk guard rails.
- Consider hybrid options if you want both pocket springs and temperature regulation.
- Check fire labels and BS EN 747 compliance for bunk beds.
Shop the full range of Pocket Sprung Mattresses to compare models side by side. Those wanting memory foam comfort alongside pocket springs can browse Memory Foam Mattresses.
Recommended Pocket Sprung Mattresses for Tog and Depth Needs
Consider these options that align with seasonal warmth and physical depth considerations. Always verify current tog and depth on the individual product pages.
| Size Category | Recommended For | Why Suitable |
|---|---|---|
| Single 90x190cm | Children or guest rooms | Balanced tog options and depths that fit standard single frames and bunk beds |
| Double 135x190cm | Couples with differing temperature needs | Deeper pocket sprung models allow zoned comfort while maintaining year-round tog balance |
| King 150x200cm | Main bedroom | Higher tog ratings available with generous depth for edge-to-edge support |
| Kids / Toddler 70x140cm | Cot beds and junior beds | Lower depth options that meet guard rail clearance and fire safety rules |
For natural breathability that helps regulate tog without excessive depth, view the Noomi Bamboo Natural Latex Pocket Sprung Mattress. Those needing firmer support in a practical depth should consider Maxitex Orthopaedic Pocket Sprung Mattress. Families can explore the full Kids' Mattresses selection.
Visit the main Mattresses category for further filtering by size such as King Size Mattresses or Super King Mattresses.
Our picks for this guide
- Noomi Bamboo Natural Latex Pocket Sprung Mattress – Combines natural latex breathability for balanced tog performance with practical depth suitable for year-round UK use.
- Maxitex Orthopaedic Pocket Sprung Mattress – Offers firmer support in a depth that works with standard bed frames while providing adequate winter tog warmth.
- Maxitex Nirvana Pocket Sprung Mattress – Medium depth profile pairs well with moderate tog ratings, making it versatile for most double and king size frames.
- Kidsaw Pocket Sprung Toddler Mattress 70 x 140cm – Shallow depth designed specifically for toddler beds and meets guard rail clearance for safe bunk or cot-bed use.
Frequently asked questions
Can I use a pocket sprung mattress with an adjustable bed?
Yes, provided the depth is compatible with the mechanism. Most pocket sprung mattresses work on adjustable bases, but check the product page for flex limitations. Shallower depths usually articulate more easily. Ensure the tog rating matches your usual bedding as adjustable positions can change how heat is retained.
What tog rating is best for a child’s pocket sprung mattress?
Children usually sleep warmer than adults, so 4.5-9 tog is often sufficient for kids’ pocket sprung mattresses. Always confirm the maximum depth allowed by the cot bed manufacturer and choose models that meet UK fire safety regulations.
Does mattress depth affect how firm a pocket sprung mattress feels?
Yes. Greater depth usually allows thicker comfort layers above the pocket springs, which can make the surface feel plusher even if the spring count is the same. Check each product page for exact depth as this is not shown in the name.
Should I choose a dual-season pocket sprung mattress?
Dual-season designs with removable toppers let you adjust warmth without buying two mattresses. They are typically deeper to accommodate the extra layer. Useful if your bedroom temperature swings widely between summer and winter. Verify the tog difference on the product page before purchase.
How do I know if my sheets will fit a deeper pocket sprung mattress?
Measure your mattress depth after it has settled for 24 hours, then add at least 5cm for corner drop on fitted sheets. Deep-fitted sheets are available for deeper mattresses. A mattress protector adds further depth, so include that in calculations.
Related guides
- Pocket Sprung Mattress Firmness Levels Explained
- Do You Need to Turn a Pocket Sprung Mattress?
- Best Pocket Sprung Mattress for Side Sleepers in the UK
- Pocket Sprung vs Continuous Spring Mattress Compared
- Memory Foam vs Pocket Sprung Mattress: Which Is Best?
- Mattress Type Quiz: Memory Foam, Pocket Sprung or Hybrid?