---
title: "Products — waterproof mattress protector king size - Flapen"
canonical_url: "https://flapen.com/research/uk/home-garden/waterproof-mattress-protector-king-size/products"
last_updated: "2026-07-31T13:26:32.790Z"
locale: en
meta:
  description: "Niche score 50/100 · £267K/yr market · 163K searches/yr. A deep review moat (22,651 avg reviews) keeps it on the watch list. Data updated Jul 2026."
  "og:description": "Niche score 50/100 · £267K/yr market · 163K searches/yr. A deep review moat (22,651 avg reviews) keeps it on the watch list. Data updated Jul 2026."
  "og:title": "Products — waterproof mattress protector king size - Flapen"
---

# **waterproof mattress protector king size**

**Worth a look**

Shows searches that convert (14.3% search→purchase), but a deep review moat (22,651 avg reviews) keeps it on the watch list.

Market size 49Growth 21Conversion 96Competition 47Returns 96Price range 48Avg price 45Brand share 43Review moat 15Quality gap 37

**Conversion**

**Incredible****14.3%**

search→purchase rate — share of searches ending in a sale

**Returns**

**Incredible****0.8%**

return rate — above 5% kills the launch gate

**Market size**

**Okay****£267K**

£267K/yr · 163K searches

**Price range**

**Okay****£6.70–£22.61**

cheapest to priciest tracked listing — scored on the share inside $15–$100

**Competition**

**Okay****57%**

top-5 click share — leaders hold, buyers still browse

**Avg price**

**Okay****£11.43**

avg listing price — sweet spot $15–$100

**Brand share**

**Okay****79%**

top-5 brand share — brands hold most of the demand

**Quality gap**

**Okay****4.5★**

avg incumbent rating — lower means beatable quality

**Growth**

**Bad****-8.5%**

90-day search growth — must beat 0% to launch

**Review moat**

**Bad****22,651.3**

avg incumbent reviews — the moat a new listing must climb